Single-piece plastic lid

Abstract

A single-piece plastic lid, having a lower part and a cap. The cap is connected to the lower part via a hinge. The lid has a guarantee strip to ensure that the lid cannot be opened unnoticed and that the lid cannot be removed from the container without damaging the guarantee strip. Thus, the guarantee strip has additional elements which enable a positive fit with both the lower part and the neck of the container. Corresponding positive fit elements are also provided on the container neck, for example in the form of snap-in elements.

What is claimed is:  
     
       1. In a container ( 50 ) with a container neck ( 5 ) and a one-piece plastic closure ( 1 ,  2 ) fastened on the container neck ( 5 ), wherein fastening means ( 54 ) for at least one of interlocking and frictional connection of the plastic closure on the container neck ( 5 ) are provided on the container neck ( 5 ), wherein the plastic closure has a lower element ( 1 ) and a cap ( 2 ) pivotably connected with the lower element ( 1 ) by at least one hinge ( 3 ), and a guarantee strip ( 4 ) indicating intactness which is applied on the cap ( 2 ) by way of a predetermined breaking point and maximally extends around a half of a circumference of the cap ( 2 ), and protrusions ( 18 ) are provided on the lower element ( 1 ), which engage with recesses ( 43 ) in the guarantee strip ( 4 ) during a first closing, the improvement comprising: the guarantee strip ( 4 ) having means ( 44 ,  46 ) for simultaneously providing an at least interlocked connection between the guarantee strip ( 4 ) and the lower element ( 1 ) and between the guarantee strip ( 4 ) and the container neck ( 5 ). 
     
     
       2. In the container and plastic closure in accordance with claim  1 , wherein a tongue ( 46 ) is arranged on the surface of the guarantee strip ( 4 ) oriented toward a center which in an original state is in operational connection with the container neck ( 5 ) through an opening ( 17 ) in the lower element ( 1 ). 
     
     
       3. In the container and plastic closure in accordance with claim  2 , wherein the tongue ( 46 ) is arranged on the guarantee strip ( 4 ) at least approximately diametrically opposite the hinge ( 3 ) between the lower element ( 1 ) and the cap ( 2 ). 
     
     
       4. In the container, and plastic closure in accordance with claim  2 , wherein the opening ( 17 ) in the lower element ( 1 ) is a slit which extends at least approximately over a height of the guarantee strip ( 4 ) and approximately parallel with a center axis of the closure, and the guarantee strip ( 4 ) completely covers the strip ( 17 ) in the original state. 
     
     
       5. In the container and plastic closure in accordance with claim  2 , wherein a groove oriented parallel with a center axis of the container neck ( 5 ) from an exterior toward the center is on the container neck ( 5 ), and the tongue ( 44 ) on the guarantee strip ( 4 ) interlockingly enters the groove in the original state of the closure on the container ( 50 ). 
     
     
       6. In the container and plastic closure in accordance with claim  5 , wherein the container neck ( 5 ) has a screw thread ( 54 ) and the groove is formed by an interruption ( 35 ) of the screw thread ( 54 ). 
     
     
       7. In the container and plastic closure in accordance with claim  2 , wherein the tongue ( 44 ) has a barb ( 45 ). 
     
     
       8. In the container and plastic closure in accordance with claim  1 , wherein the guarantee strip ( 4 ) is higher than the casing wall ( 11 ) of the lower element ( 1 ) extending around the container neck ( 5 ) and has interlocking means ( 44 ) on a lower rim which extend below the casing wall ( 11 ) of the lower element ( 1 ), and in the original state are engaged with corresponding snap-in means ( 52 ) on the container neck ( 5 ). 
     
     
       9. In the container and plastic closure in accordance with claim  8 , wherein the interlocking means ( 44 ) on the guarantee strip ( 4 ) are snap-in lamellas projecting from the guarantee strip ( 4 ) toward a center of the closure with respect to an inner surface of the guarantee strip ( 4 ). 
     
     
       10. In the container and plastic closure in accordance with claim  8 , wherein the container neck ( 5 ) has a radially extending annular bead projecting toward an exterior underneath which the interlocking means ( 44 ) on the guarantee strip ( 4 ) extend in the original state.